Messages in this thread |  | | Date | Sun, 09 Sep 2001 13:58:44 -0700 (PDT) | From | Davide Libenzi <> | Subject | Re: Purpose of the mm/slab.c changes |
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On 09-Sep-2001 Rik van Riel wrote: > On Sun, 9 Sep 2001, Davide Libenzi wrote: > >> Do You see it as a plus ? >> The new allocated slab will be very likely written ( w/o regard >> about the old content ) and an L2 mapping will generate >> invalidate traffic. > > If your invalidates are slower than your RAM, you should > consider getting another computer.
You mean a Sun, that uses a separate bus for snooping ? :) Besides to not under estimate the cache coherency traffic ( that on many CPUs uses the main memory bus ) there's the fact that the old data eventually present in L2 won't be used by the new slab user.
- Davide
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